In Stock

The product is available in our warehouse. You can place the order and you will receive it according to the shipping method.

On Demand

On Demand products are items that we bring to our customers through an order.

So place a normal order and we will ask for them to our suppliers, and will ship to you in just one shipment to save costs. The period may vary from 1 to 3 weeks. When the order is complete, we will ship it to you!.

Back Order

Currently, there is no stock, but we will receive it soon. You can buy it and we will ship the order as soon as it comes back available (normally from 1 to 3 weeks).

Orders that include an On Demand or Back Order item will be shipped when they are available again in one shipment. This means the order will take from 1 to 3 weeks to be shipped once the order is placed You will be notified when adding a backorder product in the cart. If you want to receive first the items in-stock, please, place two different orders separating the in-stock and On Demand or Back Order items.

Retired

This product is only available for search (tutorials, schematics...). They can not be purchased.

The squarish board with two chips on it is the transmitter (power with 9V). The longer board is the output and you can connect that to the part of your project that needs powering.

Inductive charging is a way of powering a device without a direct wire connection. Most people have seen inductive charging in a rechargable electric toothbrush: you may have noticed that you recharge it by placing it into the holder, but there's no direct plug. These chargers work by taking a power transformer and splitting it in half, an AC waveform is generated into one, and couples into the second coil.

This is a basic charger set, and it does work, providing 3.3V DC output from the output half when the input half is powered with 9V to 12VDC. You can draw as much as 500mA if the coils are 2 or 3 mm apart. If you only need 100 or 200mA you can be up 7mm apart. For 10mA draw, the coils can be up to half an inch (12.5mm) apart. Any non-ferrous/non-conductive material (eg air, wood, leather, plastic, paper, glass) can be used between the two coils. The material doesn't affect the distance or efficiency. The coils do need to be fairly co-axial, try to get them to be parallel and have the circles line up for best power-transfer. (This is why the electric toothbrush must fit into the plastic holder, it's lining up the two coils for best efficiency.)

Because it's an air-core transformer, it's fairly inefficient. Only about 40% of the energy in shows up on the other end, but for low power or charging project. If you draw 5V 100mA on the output side (0.5W), you'll need 0.5W * 2.5 / 9V = ~150mA from the input end. The quiescent current is about 70mA at all time, even when the other coil is not anywhere near by.

These are basic modules, probably used for some low cost toy. We don't have any datasheets or specifications for them. We do see a feedback resistor divider on the output side using 0603 SMT resistors so an advanced user could solder in different values to turn it into a different valued output.